Sulfur

Question 1

What is the colour of sulfur at room temperature?

Answer 1

solid yellow

Question 2

It is found as ? allotropes

Answer 2

two allotropes are : rhombic and monoclinic

Question 3

Uses of sulfur (Mention 6)

Answer 3

To make sulfuric acid
vulcanisation of rubber
fungicides/pesticides
fumigant(poisonous  pesticides ex: baygon)
food preservatives
Gun powder
Found mostrly in volcanic areas.

Question 4

Hydrogen Sulfide

Answer 4

Smells of rotten eggs and is toxic

Question 5

How is hydrogen sulfide formed by the reaction of a metal sulfide and acid? (see experiment)

Answer 5

FeS+2HCL–>

FeS+H2SO4–>

Question 6

SO2 – Sulfur dioxide Test for SO2

Answer 6

1. Turns acidified potassium permanganate from purple to colourless and
2. turns acidified potassium dichromate from orange to green Sulfur dioxide in this case acts as a reducing agent. orange (+6)–> (+3) green

Question 7

What is the nature of sulfur dioxide?

SO2+H2O–>

Answer 7

Acidic oxide
sulfurous acid H2SO3
SO2 is a reducing agent

Question 8

Sulfur dioxide is oxidised to ………

Answer 8

sulfur trioxide

Question 9

sulfur dioxide is oxidised to sulfur trioxide with the help of….

Answer 9

vanadium oxide V2O5

Question 10

What is vanadium oxide?

Answer 10

is a catalyst that compromise condition for a good yield and a good rate at a temp of 450 degrees celcius.

Question 11

How is oleum formed?

Answer 11

Sulfur trioxide with sulfuric acid

SO3+H2SO4–> H2S2O7 (oleum)

Question 12

What is oleum?

Answer 12

fuming sulfuric acid